Spark Plugs; Indexing - Evinrude E-Tec 40 HP Service Manual

ROUTINE SERVICE

SPARK PLUGS

SPARK PLUGS
Spark plu gs shou ld be removed and exa mined
periodically. Replace worn , fou led or d amaged
spark plugs.
Use only recommende d spark plugs with the cor-
rect gap setting.
Spark Plug, Champion
QC10WEP @ 0.028 ± 0.003 in. (0.71 mm)
Remove spark plugs and inspect condition.
•
Set spark plug gap on new, replacement spark
•
plugs.
Mark spark p lugs for gro und elect rode orienta-
•
tion.
Apply Electrical Grease to the ribbed p ortion of
•
the sp ark plug ceramic an d to t he opening of
the spark plug cover to prevent corrosion.
Install spark plugs using "indexing" procedure.
•
Removal
Remove ignition coil abo ve spark plug to ga in
access. When reinstalling coils, tighten screws to
a torque of 60 to 84 in. lbs. (7 to 9.5 N·m).

Indexing

Spark p lug indexing position s the groun d ele c-
trode of the sp ark plug opp osite the fuel injector
nozzle.
Put an in k mark on the cera mic of the spark plug
in line with the OPEN sid e of the ground ele c-
trode. Th is mark will be used to orient the sp ark
42
plug with the OPEN sid e of the ground electrode
facing the fuel injector.
2
1. Ink mark
2. Open side
Apply Triple-Guard grease to th e ga sket surface
of the spark plug. Install spark plug and tighten to
a torque of 15 ft. lbs. (20 N·m).
If the mark is in unshaded area do not tighten any-
more.
1
Spark Plug Indexing Diagram
1. Unshaded area
2. Shaded area
If the ma rk is in the shaded area, reset torq ue
wrench to 30 ft. lbs. (41 N·m) and continue to turn
until the mark is in the unshaded area.
If the mark does not rea ch the unsh aded ar ea
006521
before the torque of 30 ft. lbs. (41 N·m) is reached,
the spark plug cannot be indexed for that cylinder.
Try another sp ark plug an d repe at th e ste ps
above.
1
000758
2
002106